package org.linlinjava.litemall.core.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.filter.CorsFilter;

@Configuration
public class CorsConfig {
    // 当前跨域请求最大有效时长。这里默认30天
    private long maxAge = 30 * 24 * 60 * 60;

    private CorsConfiguration buildConfig() {
        CorsConfiguration corsConfiguration = new CorsConfiguration();
        corsConfiguration.addAllowedOrigin("*"); // 1 设置访问源地址
        corsConfiguration.addAllowedHeader("*"); // 2 设置访问源请求头
        corsConfiguration.addAllowedMethod("OPTIONS"); // 3 设置访问源请求方法
        corsConfiguration.addAllowedMethod("HEAD"); // 3 设置访问源请求方法
        corsConfiguration.addAllowedMethod("GET"); // 3 设置访问源请求方法
        corsConfiguration.addAllowedMethod("PUT"); // 3 设置访问源请求方法
        corsConfiguration.addAllowedMethod("POST"); // 3 设置访问源请求方法
        corsConfiguration.addAllowedMethod("DELETE"); // 3 设置访问源请求方法
        corsConfiguration.addAllowedMethod("PATCH"); // 3 设置访问源请求方法

        corsConfiguration.addExposedHeader("Content-Type");
        corsConfiguration.addExposedHeader( "X-Requested-With");
        corsConfiguration.addExposedHeader("accept");
        corsConfiguration.addExposedHeader("Origin");
        corsConfiguration.addExposedHeader( "Access-Control-Request-Method");
        corsConfiguration.addExposedHeader("Access-Control-Request-Headers");
        corsConfiguration.setMaxAge(maxAge);
        corsConfiguration.setAllowCredentials(true);
        return corsConfiguration;
    }

    @Bean
    public CorsFilter corsFilter() {
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", buildConfig()); // 4 对接口配置跨域设置
        return new CorsFilter(source);
    }
}
